Composition support matrix
Scope
Current support matrix for v1 composition patterns.
| Pattern | Status | Notes |
|---|---|---|
| Single leg | supported | Baseline for all tenants |
| Multi leg | supported | Shared custody checkpoints |
| Hybrid freight + porter | supported | Partial connectivity tolerant |
| Return chain | partial | Controlled rollout |
| Rework loop | not in v1 | Planned post-v1 |
| Parallel fan-out | not in v1 | Requires additional policy controls |
Invariants
- Unsupported patterns must fail fast with explicit error codes.
- Partial support must declare all constraints in API contract docs.
Failure Modes
- Pattern requested without feature gate checks.
- Implicit fallback to unsupported execution path.
Out of Scope
- Customer-level enablement policies.
- Internal rollout calendar and tenant sequencing.